There are a number of messages floating about unsuccessful attempts at running OpenBSD under a VirtualPC 6 / Virtual PC 7 on an MacOS X host such as this:
http://marc.theaimsgroup.com/?l=openbsd-misc&m=111792100814652&w=2 Well... I got it to work, but it was rather roundabout. Although what I am doing below seems totally random, it is 100% repeatable (at least on my PBG4 an G5). If you try to install OpenBSD using the standard installation process, it bombs with a processor error while untaring base37.tgz. To work around the "processor error" issue that seems to happen during the installation, I had to manually untar base37.tgz from a slice that was on the "virtual hard disk." To make it work, I started a normal OpenBSD installation process, made my slices, (minimal seems to work best here... add your big /home slice later) and then continued on to where I had to select my installation sets. I deselected everything except bsd and etc37.tgz and complete the installation. Once the installation routine exited, I manually did a cd /mnt && tar -xpzf /location/of/distro/base37.tgz ... for some reason, when you to a tar this way it doesn't bomb out the way it does during the installer. Once you do that, you still have to run MAKEDEV in /mnt/dev in order for your machine to boot. Once that's done, boot to single user mode, set a root password, reboot, and off you go... a working VirtualPC OpenBSD installation. I hope this helps somebody. Access over 1 million songs. Try it free. http://music.yahoo.com/unlimited/